Xtensa GCC 10.x, GDB 9.x compiler binaries and newlib for DSPs used by SOF.
UPDATE 5th August 2021
Add toolchain for imx8ulp.
UPDATE 26th March 2021
Bug fixed in xtensa-overlay for hsw and cnl targets. No ct-NG changes. New binaries for xtensa-hsw-elf and xtensa-cnl-elf attached.